122821465 has 8 divisors (see below), whose sum is σ = 158723208. Its totient is φ = 90698880.

The previous prime is 122821451. The next prime is 122821471. The reversal of 122821465 is 564128221.

122821465 = 7836² + 7837².

It can be written as a sum of positive squares in 4 ways, for example, as 2458624 + 120362841 = 1568^2 + 10971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122821465 - 2⁷ = 122821337 is a prime.

It is a super-2 number, since 2×122821465² = 30170224529492450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944716 + ... + 944845.

It is an arithmetic number, because the mean of its divisors is an integer number (19840401).

Almost surely, 2^122821465 is an apocalyptic number.

122821465 is the 7837-th centered square number.

It is an amenable number.

122821465 is a deficient number, since it is larger than the sum of its proper divisors (35901743).

122821465 is a wasteful number, since it uses less digits than its factorization.

122821465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889579.

The product of its digits is 7680, while the sum is 31.

The square root of 122821465 is about 11082.4846040949. The cubic root of 122821465 is about 497.0782466372.

Adding to 122821465 its reverse (564128221), we get a palindrome (686949686).

The spelling of 122821465 in words is "one hundred twenty-two million, eight hundred twenty-one thousand, four hundred sixty-five".